Governor for feed-pumps



(No Model.) 2 Shjeets-S heet 1.

J.THOMAS.' GOVERNOR. FOR FEED PUMPS. No. 519,360. Patented May 8,1894.

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. J. THOMAS. Gammon PORQPEED PUMPS. I

No. 519,360. Patented May 8, 1894.

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UNITED STATES PATENT OFFICE.

JOSHUA THOMAS, on CLEVELAND, OHIO.

GOVERNOR FOR FEED-PUMPS.

SPECIFICATION forming part of Letters Patent No. 519,360, dated May 8,1894.

Application filed February 27, 1893- Serial No. 463,844.. (No model.)

feed pumps, and consists in the construction I and combinationssubstantiallyas hereinafter described and pointed out in the claim.

In the accompanying drawings, Figure 1 is a rear end elevation of two ofa battery of boilers showing the pipe connections with the same, and asteam pump having my governor attached. Fig. 2 is a longitudinal sectionof the governor.

A represents the rear ends of two of a bat tery of boilers, which may beof any of the well known constructions, and P is a steam pump. I

B is a steam pipe between t the boiler and the steam chest of the pumpengine.

0 is the discharge pipe from the pump cylinder to the boiler.

F represents pipes in a feed water regulator for which a patent wasgranted to me December 27, 1892.

The subject of this application is an automatic pump governor, describedas follows:

D is a frame, one end of which is connected with the steam valve E inthe steam pipe 13, and is provided with a stuffing box, through whichthe valve stem G passes. .In the other end of the frame D is provided asmall cylinder H in which is a piston I, its rod joined.

to valve stem G. The cylinder H is connected by a union and T connectionwith the discharge pipe 0, or it may be connected directly with theair-chamber J, of the pump if. desired, as may be most convenient. Be-

tween the union and T is provided a throttle valve, for closing saidcommunication when desired. K is a cross-bar on the piston rod, joinedto the cylinder end of frameD by rods L, L, and a spiral spring s isplaced on the piston rod between the piston and the said cross bar K. mis a union nut on the piston rod for adjusting the length of the rod andvalve stem. 0 is a gage suitably attached to the discharge pipe orair-chamber, by which the pressure may be readily ascertalned.

The valve E and pistonI are opposed to each other, so thatwhen the steampressure and the water pressure are alike, the pump ceases to act,should the water pressure go down the steam pressure will force thevalve E open and set the pump going until the water pressure is againraised to equal the steam pressure.

The design of the spring is to give some advantage to the steam valve.By tlghtening up on the nuts on rods L, L, the spring is forced againstthe piston head, thereby creating as much or as little water pressureabove the steam pressure as desired, and this extra pressure will bemaintained followrng the steam pressure up or down, thus maintain'ing aneven pressure that puts water in the boiler whether the steam is high orlow.

Having described my invention, I claim- The combination in a governorfor feed pumps for steam boilers, of a frame D,cy11nder H in one end ofsaid frame, p1ston I 111 said cylinder actuated by the Water pressurefrom the boiler; valve E attached to oppos te end of said frame D andjoined to said piston by joint piston rod and valve stem G,

said valve actuated by the steam pressure from the boiler in oppositionto said Water pressure; a cross-head K on said rod Gr,rods L Lconnecting said cross-head to the frar ne D; and springs S on said rod Ghaving its bearings against said cross head and plston,

constructed and adapted to operate substantially as and for the purposeset forth.

JOSHUA THOMAS. Witnesses: GEO. W. TIBBITTS, E. JAY PINNEY.

